1 /* GTK - The GIMP Toolkit
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
19 * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
20 * file for a list of people on the GTK+ Team. See the ChangeLog
21 * files for a list of changes. These files are distributed with
22 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
27 #include "gtkmenuprivate.h"
28 #include "gtkmenuitemprivate.h"
29 #include "gtkstylecontext.h"
30 #include "gtktearoffmenuitem.h"
35 * SECTION:gtktearoffmenuitem
36 * @Short_description: A menu item used to tear off and reattach its menu
37 * @Title: GtkTearoffMenuItem
40 * A #GtkTearoffMenuItem is a special #GtkMenuItem which is used to
41 * tear off and reattach its menu.
43 * When its menu is shown normally, the #GtkTearoffMenuItem is drawn as a
44 * dotted line indicating that the menu can be torn off. Activating it
45 * causes its menu to be torn off and displayed in its own window
48 * When its menu is shown as a tearoff menu, the #GtkTearoffMenuItem is drawn
49 * as a dotted line which has a left pointing arrow graphic indicating that
50 * the tearoff menu can be reattached. Activating it will erase the tearoff
53 * <note>#GtkTearoffMenuItem is deprecated and should not be used in newly
54 * written code. Menus are not meant to be torn around.</note>
60 #define BORDER_SPACING 3
62 struct _GtkTearoffMenuItemPrivate
67 static void gtk_tearoff_menu_item_get_preferred_width (GtkWidget *widget,
70 static void gtk_tearoff_menu_item_get_preferred_height (GtkWidget *widget,
73 static gboolean gtk_tearoff_menu_item_draw (GtkWidget *widget,
75 static void gtk_tearoff_menu_item_activate (GtkMenuItem *menu_item);
76 static void gtk_tearoff_menu_item_parent_set (GtkWidget *widget,
79 G_DEFINE_TYPE (GtkTearoffMenuItem, gtk_tearoff_menu_item, GTK_TYPE_MENU_ITEM)
82 * gtk_tearoff_menu_item_new:
84 * Creates a new #GtkTearoffMenuItem.
86 * Returns: a new #GtkTearoffMenuItem.
88 * Deprecated: 3.4: #GtkTearoffMenuItem is deprecated and should not be
89 * used in newly written code.
92 gtk_tearoff_menu_item_new (void)
94 return g_object_new (GTK_TYPE_TEAROFF_MENU_ITEM, NULL);
98 gtk_tearoff_menu_item_class_init (GtkTearoffMenuItemClass *klass)
100 GtkWidgetClass *widget_class;
101 GtkMenuItemClass *menu_item_class;
103 widget_class = (GtkWidgetClass*) klass;
104 menu_item_class = (GtkMenuItemClass*) klass;
106 widget_class->draw = gtk_tearoff_menu_item_draw;
107 widget_class->get_preferred_width = gtk_tearoff_menu_item_get_preferred_width;
108 widget_class->get_preferred_height = gtk_tearoff_menu_item_get_preferred_height;
109 widget_class->parent_set = gtk_tearoff_menu_item_parent_set;
111 gtk_widget_class_set_accessible_role (widget_class, ATK_ROLE_TEAR_OFF_MENU_ITEM);
113 menu_item_class->activate = gtk_tearoff_menu_item_activate;
115 g_type_class_add_private (klass, sizeof (GtkTearoffMenuItemPrivate));
119 gtk_tearoff_menu_item_init (GtkTearoffMenuItem *tearoff_menu_item)
121 GtkTearoffMenuItemPrivate *priv;
123 tearoff_menu_item->priv = G_TYPE_INSTANCE_GET_PRIVATE (tearoff_menu_item,
124 GTK_TYPE_TEAROFF_MENU_ITEM,
125 GtkTearoffMenuItemPrivate);
126 priv = tearoff_menu_item->priv;
128 priv->torn_off = FALSE;
132 gtk_tearoff_menu_item_get_preferred_width (GtkWidget *widget,
136 GtkStyleContext *context;
141 context = gtk_widget_get_style_context (widget);
142 state = gtk_widget_get_state_flags (widget);
144 gtk_style_context_get_padding (context, state, &padding);
145 border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
147 *minimum = *natural = (border_width + BORDER_SPACING) * 2 + padding.left + padding.right;
151 gtk_tearoff_menu_item_get_preferred_height (GtkWidget *widget,
155 GtkStyleContext *context;
161 context = gtk_widget_get_style_context (widget);
162 state = gtk_widget_get_state_flags (widget);
164 gtk_style_context_get_padding (context, state, &padding);
165 border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
167 *minimum = *natural = (border_width * 2) + padding.top + padding.bottom;
169 parent = gtk_widget_get_parent (widget);
170 if (GTK_IS_MENU (parent) && GTK_MENU (parent)->priv->torn_off)
172 *minimum += ARROW_SIZE;
173 *natural += ARROW_SIZE;
177 *minimum += padding.top + 4;
178 *natural += padding.top + 4;
183 gtk_tearoff_menu_item_draw (GtkWidget *widget,
186 GtkMenuItem *menu_item;
188 GtkStyleContext *context;
190 gint x, y, width, height;
193 GtkTextDirection direction;
197 menu_item = GTK_MENU_ITEM (widget);
198 context = gtk_widget_get_style_context (widget);
199 direction = gtk_widget_get_direction (widget);
200 state = gtk_widget_get_state_flags (widget);
202 border_width = gtk_container_get_border_width (GTK_CONTAINER (menu_item));
205 width = gtk_widget_get_allocated_width (widget) - border_width * 2;
206 height = gtk_widget_get_allocated_height (widget) - border_width * 2;
207 right_max = x + width;
209 gtk_style_context_save (context);
210 gtk_style_context_set_state (context, state);
211 gtk_style_context_get_padding (context, state, &padding);
213 if (state & GTK_STATE_FLAG_PRELIGHT)
215 gtk_render_background (context, cr, x, y, width, height);
216 gtk_render_frame (context, cr, x, y, width, height);
219 parent = gtk_widget_get_parent (widget);
220 if (GTK_IS_MENU (parent) && GTK_MENU (parent)->priv->torn_off)
224 if (menu_item->priv->toggle_size > ARROW_SIZE)
226 if (direction == GTK_TEXT_DIR_LTR)
228 arrow_x = x + (menu_item->priv->toggle_size - ARROW_SIZE)/2;
229 angle = (3 * G_PI) / 2;
233 arrow_x = x + width - menu_item->priv->toggle_size + (menu_item->priv->toggle_size - ARROW_SIZE)/2;
236 x += menu_item->priv->toggle_size + BORDER_SPACING;
240 if (direction == GTK_TEXT_DIR_LTR)
242 arrow_x = ARROW_SIZE / 2;
243 angle = (3 * G_PI) / 2;
247 arrow_x = x + width - 2 * ARROW_SIZE + ARROW_SIZE / 2;
253 gtk_render_arrow (context, cr, angle,
254 arrow_x, height / 2 - 5,
258 while (x < right_max)
262 if (direction == GTK_TEXT_DIR_LTR)
265 x2 = MIN (x + TEAR_LENGTH, right_max);
270 x2 = MAX (right_max - x - TEAR_LENGTH, 0);
273 gtk_render_line (context, cr,
274 x1, y + (height - padding.bottom) / 2,
275 x2, y + (height - padding.bottom) / 2);
276 x += 2 * TEAR_LENGTH;
279 gtk_style_context_restore (context);
285 gtk_tearoff_menu_item_activate (GtkMenuItem *menu_item)
289 parent = gtk_widget_get_parent (GTK_WIDGET (menu_item));
290 if (GTK_IS_MENU (parent))
292 GtkMenu *menu = GTK_MENU (parent);
294 gtk_widget_queue_resize (GTK_WIDGET (menu_item));
295 gtk_menu_set_tearoff_state (GTK_MENU (parent),
296 !menu->priv->torn_off);
301 tearoff_state_changed (GtkMenu *menu,
305 GtkTearoffMenuItem *tearoff_menu_item = GTK_TEAROFF_MENU_ITEM (data);
306 GtkTearoffMenuItemPrivate *priv = tearoff_menu_item->priv;
308 priv->torn_off = gtk_menu_get_tearoff_state (menu);
312 gtk_tearoff_menu_item_parent_set (GtkWidget *widget,
315 GtkTearoffMenuItem *tearoff_menu_item = GTK_TEAROFF_MENU_ITEM (widget);
316 GtkTearoffMenuItemPrivate *priv = tearoff_menu_item->priv;
320 parent = gtk_widget_get_parent (widget);
321 menu = GTK_IS_MENU (parent) ? GTK_MENU (parent) : NULL;
324 g_signal_handlers_disconnect_by_func (previous,
325 tearoff_state_changed,
330 priv->torn_off = gtk_menu_get_tearoff_state (menu);
331 g_signal_connect (menu, "notify::tearoff-state",
332 G_CALLBACK (tearoff_state_changed),